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Single-phase three-wire / Three-phase three-wire system
＊Two current transformers are required.
Three-phase four-wire system
＊Three current transformers are required.
◆When measuring a load with exceed input voltage
VT (Voltage transformer) is needed when you measure a load with over rated input voltage (440V).
Use commercial VT, those secondary rating is 110V.
Grounding the secondary side of VT (Voltage transformer) and CT (Current transformer) is not
necessary with low-voltage circuit.
Single-phase two-wire system
Do not wire ⑥ terminals. They are connected internal.
Single-phase, three-wire system
Three-phase, three-wire system
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KW1M Eco－POWER METER
Three-phase, four-wire system
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